PDF malware analysis — malicious · 2c3ce6ca307711e2

MALICIOUS

PDF

118.6 KB

MD5: 9c151a5ac6717c49223db1dd7503a397 SHA-1: 810ae6a0fa1ff4e7a3ad52fd997943dc8be8ae5b SHA-256: 2c3ce6ca307711e27fa461f6adc88531afb970cae4b2e1baa073503c2833a1df

206 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF contains embedded JavaScript, including calls to eval() and String.fromCharCode(), which are common techniques for obfuscating malicious code. Heuristics indicate a large comment-padded JavaScript eval stager and PRC/3D content, suggesting an exploit attempt. The presence of a JavaScript object file (javascript_obj0006_000.js) further supports the execution of embedded scripts. This script likely downloads and executes a second-stage payload, a common attack pattern for malicious PDFs.

Heuristics 8

PRC/3D content in PDF high CVE related PDF_PRC_3D

PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
ClamAV: Pdf.Exploit.Agent-36086 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36086
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
Large comment-padded JavaScript eval stager high PDF_JS_LARGE_COMMENT_PADDED_EVAL

PDF JavaScript contains a very large stream padded with long random-looking block comments around String.fromCharCode and eval. This is an exploit-kit obfuscation shape used to bury a decoder and recovered stage inside noise, not normal PDF form automation.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `af196e8b5e3267aba4565cfaf12226b0a03020a462b0a0139ea2793c8ff1dc38`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	626379 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 42 long base64-like blob(s).

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